why would you change the trans fluid on the automatic at 39km? The auto trans is supposed to go around 100k miles (160,000km) without needing service. Some people do it around 80k miles, but 39,000km is way too early.

why would you change the trans fluid on the automatic at 39km? The auto trans is supposed to go around 100k miles (160,000km) without needing service. Some people do it around 80k miles, but 39,000km is way too early.

Not necessarily, ask any old timer..they'll say around 30k...or earlier..Yes BMW quotes the tranny fluid is good till 100k too but that's also when any of their warranties expire also.(No it wont blow up @ 100,001) but A few hundred dollars over the life time of the car is still alot cheaper than a $5,000 transmission.. IMO

Not necessarily, ask any old timer..they'll say around 30k...or earlier..Yes BMW quotes the tranny fluid is good till 100k too but that's also when any of their warranties expire also.(No it wont blow up @ 100,001) but A few hundred dollars over the life time of the car is still alot cheaper than a $5,000 transmission.. IMO

OP, Do you have access to a Scan tool ?

I can find a shop which has it but no code ever appear so I'm not sure will that help...... but I will try.

REMEMBER TO USE OEM ATF...No redline, motual, r purple if you want to save your tranny

Not too sure did the shop drain out all the fluid 100% completely but even if there's old ATF there it should be not be a lot left...... may I ask why can't mix old ATF with new?? what is the reason behind it? thanks

btw.... I did use OEM ATF but did not change my AT pan/filter last time.

I can find a shop which has it but no code ever appear so I'm not sure will that help...... but I will try.

Look around on the forum, maybe theirs someone in your area to help ya out..Might help by just doing adaptation reset.

Quote:

Originally Posted by testdriver

Not too sure did the shop drain out all the fluid 100% completely but even if there's old ATF there it should be not be a lot left...... may I ask why can't mix old ATF with new?? what is the reason behind it? thanks

btw.... I did use OEM ATF but did not change my AT pan/filter last time.

You really cant drain all the fluid out an automatic trans..(Torque converter, valve body,pump...all hold fluid) Mixing old n new fluid is going to happen regardless..Same thing as an oil change..you never get it all out..

you never get it all out but flushing it then a pan/filter change can at least get you 85% new fluid. the torque converter and other listed can hold up to 3-4 qts. if you dont flush it then dont touch it at all

Look around on the forum, maybe theirs someone in your area to help ya out..Might help by just doing adaptation reset.

I actually has a "feeling" this could be a software problem regarding than hardware.... may I ask what is " adaptation reset" ?

I try to figure out is it possible for me to reset my tranny ecu and make it learn how to drive again....

I agree with you that unless it is a brand new tranny... there's no way one can drain out all the ATF.... anyway, a shop did tell me to change the ATF with oil pan/ filter to see if it can fix the problem. I'm not too sure will that work.

you never get it all out but flushing it then a pan/filter change can at least get you 85% new fluid. the torque converter and other listed can hold up to 3-4 qts. if you dont flush it then dont touch it at all

I understand what you meant... and more than one person has said do not mix old ATF with new. My question is if this is a big no no..... then why would my tranny doing fine after the ATF changed and the problem occur 5 months later (3000km) ?

I've been searching every website to see if anyone else had this problem. My 328i sport does the same exact thing ! It kicks/jumps right as i slow down to the 10mph mark. Every time, I took it to the dealer and drove with a mechanic. It stopped doing it right then and there. As soon as I left the lot it returned and has gotten really bad, sometimes the whole car shakes.